<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script>


function boom()
{
  document.getElementById("foo").appendChild(document.getElementById("bar"));
}

window.addEventListener("load", boom, false);

</script>
</head>

<body>

  <div id="foo"></div>

  <svg xmlns="http://www.w3.org/2000/svg">
    <defs>
      <linearGradient id="grad1"/>
    </defs>
    <rect id="bar" style="fill:url(#grad1);" />  
  </svg>

</body>
</html>
